THE DENSITY FIELD OF THE 10k zCOSMOS GALAXIES

被引：106

作者：

Kovac, K. ^{[1
]}

Lilly, S. J. ^{[1
]}

Cucciati, O. ^{[2
,3
]}

Porciani, C. ^{[1
,4
]}

Iovino, A. ^{[2
]}

Zamorani, G. ^{[5
]}

Oesch, P. ^{[1
]}

Bolzonella, M. ^{[5
]}

Knobel, C. ^{[1
]}

Finoguenov, A. ^{[6
]}

Peng, Y. ^{[1
]}

Carollo, C. M. ^{[1
]}

Pozzetti, L. ^{[5
]}

Caputi, K. ^{[1
]}

Silverman, J. D. ^{[1
]}

Tasca, L. A. M. ^{[3
]}

Scodeggio, M. ^{[7
]}

Vergani, D. ^{[5
]}

Scoville, N. Z. ^{[8
]}

Capak, P. ^{[8
,9
]}

Contini, T. ^{[10
]}

Kneib, J. -P. ^{[3
]}

Le Fevre, O. ^{[3
]}

Mainieri, V. ^{[11
]}

Renzini, A. ^{[12
]}

Bardelli, S. ^{[5
]}

Bongiorno, A. ^{[6
]}

Coppa, G. ^{[5
]}

de la Torre, S. ^{[2
,3
,7
]}

de Ravel, L. ^{[3
]}

Franzetti, P. ^{[7
]}

Garilli, B. ^{[7
]}

Guzzo, L. ^{[2
]}

Kampczyk, P. ^{[1
]}

Lamareille, F. ^{[10
]}

Le Borgne, J. -F. ^{[10
]}

Le Brun, V. ^{[3
]}

Maier, C. ^{[1
]}

Mignoli, M. ^{[5
]}

Pello, R. ^{[10
]}

Montero, E. Perez ^{[10
]}

Ricciardelli, E. ^{[12
]}

Tanaka, M. ^{[11
]}

Tresse, L. ^{[3
]}

Zucca, E. ^{[5
]}

Abbas, U. ^{[3
,13
]}

Bottini, D. ^{[7
]}

Cappi, A. ^{[5
]}

Cassata, P. ^{[3
]}

Cimatti, A. ^{[14
]}

机构：

[1] Swiss Fed Inst Technol, Inst Astron, CH-8093 Zurich, Switzerland

[2] INAF Osservatorio Astron Brera, Milan, Italy

[3] Lab Astrophys Marseille, Marseille, France

[4] Argelander Inst Astron, D-53121 Bonn, Germany

[5] INAF Osservatorio Astron Bologna, I-40127 Bologna, Italy

[6] Max Planck Inst Extraterr Phys, D-84571 Garching, Germany

[7] INAF IASF Milano, Milan, Italy

[8] CALTECH, Pasadena, CA 91125 USA

[9] Spitzer Sci Ctr, Pasadena, CA 91125 USA

[10] Univ Toulouse, CNRS, Lab Astrophys Toulouse Tarbes, F-31400 Toulouse, France

[11] European So Observ, D-85748 Garching, Germany

[12] Univ Padua, Dipartimento Astron, I-35122 Padua, Italy

[13] INAF Osservatorio Astron Torino, I-10025 Turin, Italy

[14] Univ Bologna, Dipartimento Astron, I-40127 Bologna, Italy

[15] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[16] Ctr Phys Theor, Marseille, France

[17] Univ Paris 06, CNRS, UMR 7095, Inst Astrophys Paris, F-75014 Paris, France

[18] Univ Sternwarte, D-81679 Munich, Germany

[19] INAF, Osservatorio Roma, Monte Porzio Catone, RM, Italy

来源：

ASTROPHYSICAL JOURNAL | 2010年 / 708卷 / 01期

基金：

瑞士国家科学基金会;

关键词：

galaxies: high-redshift; large-scale structure of universe; surveys; VLT DEEP SURVEY; SMOOTHED PARTICLE HYDRODYNAMICS; LARGE-SCALE STRUCTURE; DIGITAL SKY SURVEY; LY-ALPHA EMITTERS; REDSHIFT SURVEY; ENVIRONMENTAL DEPENDENCE; LUMINOSITY DEPENDENCE; STELLAR MASS; COSMOS FIELD;

D O I：

10.1088/0004-637X/708/1/505

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use the current sample of similar to 10,000 zCOSMOS spectra of sources selected with I(AB) < 22.5 to define the density field out to z similar to 1, with much greater resolution in the radial dimension than has been possible with either photometric redshifts or weak lensing. We present the new algorithm that we have developed (ZADE) to incorporate objects not yet observed spectroscopically by modifying their photometric redshift probability distributions using the spectroscopic redshifts of nearby galaxies. We present a number of tests on mock catalogs used to justify this approach. The ZADE algorithm allows us to probe a broader range of galaxy environments and reduce the Poisson noise in the density field. The reconstructed overdensity field of the 10k zCOSMOS galaxies consists of cluster-like patterns surrounded by void-like regions, extending up to z similar to 1. Some of these structures are very large, spanning the similar to 50 h(-1) Mpc transverse direction of the COSMOS field and extending up to Delta z similar to 0.05 in redshift. We present the three-dimensional overdensity maps and compare the reconstructed overdensity field to the independently identified virialized groups of galaxies and clusters detected in the visible and in X-rays. The distribution of the overdense structures is in general well traced by these virialized structures. A comparison of the large-scale structures in the zCOSMOS data and in the mock catalogs reveals an excellent agreement between the fractions of the volume enclosed in structures of all sizes above a given overdensity between the data and the mocks in 0.2 < z < 1, although in the data these overdense regions are in generally larger contiguous structures.

引用

页码：505 / 533

页数：29

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